MST Performance Cold Air Intake SystemThe ADA403 is a precision engineered cold air intake system designed for the B9 Audi A4 A5 (2015 onward) 2. 0 TFSI 40 TFSI model. It replaces the stock airbox with a performance grade intake featuring a rigid heat shield, high flow silicone piping, and a reusable dry cone filter delivering improved airflow, reduced intake temperatures, sharper throttle response, and a deeper engine induction sound. These enhancements are achieved without altering the